Data Sheet

ET Valve
D100022X012
Product Bulletin
51.1:ET
December 2012
6
ENVIRO-SEAL, HIGH-SEAL
Packing Systems
ENVIRO-SEAL and HIGH-SEAL packing systems offer
exceptional sealing capabilities. These systems easily
install in existing valves or can be purchased with new
valves. These systems help seal the process to
conserve valuable process fluid. The long-life and
reliability of these systems also reduce maintenance
costs and downtime.
For applications requiring compliance with
environmental protection regulations, the unique
ENVIRO-SEAL packing system (figure 10) and a unique
ENVIRO-SEAL bellows seal system (figure 9) are
offered. The emission control packing system keeps
emission concentrations below the EPA 100 ppm
requirement.
For an excellent stem seal in applications that are not
environmentally-sensitive, the HIGH-SEAL Graphite
ULF packing system (figure 10) is offered. The
HIGH-SEAL packing system provides improved sealing
at pressure/temperature ratings beyond ENVIRO-SEAL
limits.
ENVIRO-SEAL packing systems, available with PTFE,
Graphite ULF, or duplex packing, and the HIGH-SEAL
Graphite ULF packing system feature live-loading and
unique packing-ring arrangements for long-term,
consistent sealing performance.
ANSI/FCI Class VI Shutoff
Capabilities
ET valves with soft seat and metal seat constructions
can provide ANSI/FCI Class VI shut-off capabilities. See
tables 3 and 4.
Table 3. Class VI Shutoff Availability
(1, 2)
Valve Port Size, Inches Seat Minimum Seat Load
ET
² 3.4375 ± 7
Soft See Catalog 14
ET
² 3.4375 ± 7
Metal 300 lbs/lineal inch
1. Limited retrofit capability. Consult your Emerson Process Management sales office.
2. Not for use with NPS 8.
Table 4. Class VI Trim Materials
VALVE
CAGE/SEAT
RING RETAINER
VALVE PLUG SEAT RING SEAL RING
TRIM TEMPERATURE LIMIT
_C _F
ET
S31600 / ENC
S31600 w/
standard beveled
seat
S31600/PTFE
UHMWPE
(1)
R30003
-198 to 66 -325 to 150
S31600 / ENC
S31600/CoCr-A
seat w/ radiused
seat (special
design)
S31600 w/ wide
beveled seat
(special design)
UHMWPE R30003 -198 to 66 -325 to 150
S17400 (17-4PH
SST)
S41600 w/
standard beveled
seat
S31600/PTFE UHMWPE R30003 -29 to 66 -20 to 150
S17400
S41600 w/ radiused
seat (special
design)
S31600 w/ wide
beveled seat
(special design)
UHMWPE R30003 -29 to 66 -20 to 150
1. UHMWPE (Ultra High Molecular Weight Polyethylene)